\documentclass{exam-zh}
\examsetup{
  font = garamond ,  % yes
  % font = libertinus ,  % yes
  % font = lm , % yes
  % font = newcm , % yes
  % font = pala , % yes
  % font = stix , % yes
  % font = termes , % yes
  % font = times , % yes
  % font = xits , % yes
  % font = none
  math-font = asana ,  % yes
  % math-font = cambria ,  % yes
  % math-font = garamond ,  % yes
  % math-font = libertinus ,  % yes
  % math-font = lm ,   % yes
  % math-font = newcm ,  % yes
  % math-font = pala ,  % yes
  % math-font = stix ,  % yes
  % math-font = xits , % yes
  % math-font = none
}

\begin{document}

中文测试

{English test 1234567}

{\itshape English test 1234567}

{\bfseries English test 1234567}

{\sffamily English test 1234567}

% $\bm{ab}$
% $\bm{AB}$
% $\bm{a1}$
% $\bm{1a}$
% $\bm{1}$

$\boldsymbol{ab}$
$\boldsymbol{AB}$
$\boldsymbol{a1}$
$\boldsymbol{1a}$
$\boldsymbol{1}$

\end{document}